EP0214830B1 - Connecteur pour un circuit imprimé flexible - Google Patents

Connecteur pour un circuit imprimé flexible Download PDF

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Publication number
EP0214830B1
EP0214830B1 EP86306772A EP86306772A EP0214830B1 EP 0214830 B1 EP0214830 B1 EP 0214830B1 EP 86306772 A EP86306772 A EP 86306772A EP 86306772 A EP86306772 A EP 86306772A EP 0214830 B1 EP0214830 B1 EP 0214830B1
Authority
EP
European Patent Office
Prior art keywords
housing
contacts
flexible printed
printed circuit
connector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86306772A
Other languages
German (de)
English (en)
Other versions
EP0214830A2 (fr
EP0214830A3 (en
Inventor
Toshio Kinoshita
Naoki Hiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to AT86306772T priority Critical patent/ATE66766T1/de
Publication of EP0214830A2 publication Critical patent/EP0214830A2/fr
Publication of EP0214830A3 publication Critical patent/EP0214830A3/en
Application granted granted Critical
Publication of EP0214830B1 publication Critical patent/EP0214830B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/592—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connections to contact elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/78—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to other flexible printed circuits, flat or ribbon cables or like structures
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • H05K1/0281—Reinforcement details thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistors
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits
    • H05K3/325—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by abutting or pinching; Mechanical auxiliary parts therefor

Definitions

  • This invention relates to an electrical connector, and in particular a connector for an FPC (flexible printed circuit).
  • FPC connectors such as a ZIF (zero insertion force) connector and a connector using a soldering method are known in which an exposed-conductor portion of the forward end portion of an FPC is electrically connected to an array of contacts disposed within an insulating housing.
  • solder type connector the conductors exposed at the forward end portion of the FPC are connected by soldering to the contacts in a one-to-one correspondence.
  • the exposed-conductor portion of the forward end portion of the FPC is inserted into the female contacts arranged within a housing, and then the FPC is connected by a suitable external force to the female contacts.
  • an insulating housing having an elongated opening and an array of female resilient contacts arranged within the housing and accessible through the opening, each contact having a first region fitted to a first wall of said housing at one side of the elongated opening and a second contact region disposed alongside a second wall of the housing facing the first wall; and a flexible printed circuit assembly.
  • An object of this invention is to provide an improved FPC connector.
  • a connector for flexible printed circuits said connector having a flexible printed circuit assembly further comprising a V-shaped spring member made from sheet material bent along a line to provide first and second inclined sections and a flexible printed circuit attached to the outside surface of the spring member having an area of exposed-conductors for electrical connection with the contact regions of the contacts, whereby the flexible printed circuit assembly can be inserted into the housing through the opening with the spring member engaged between the fixed and contact regions of the female contacts under resilient force.
  • the resiliency of the contacts and of the spring member of the FPC assembly complement one another.
  • a connector constructed in accordance with the invention can ensure a positive electrical connection between an FPC and a female contact array and the FPC can be easily fitted to and dismantled from the female contact array. Moreover, the FPC need not be exposed to undue wear.
  • the FPC assembly is gently compressed to bring the sections of the spring member closer together for insertion into the housing and the contacts.
  • guide means serve to guide the assembly as it is inserted into the housing. Once fitted, the sections of the spring member bias the exposed conductors into good electrical contact with the resilient contact sections of the contacts.
  • a latch means serves to lock the FPC assembly in the housing but by grasping the assembly and compressing the sections of the spring member together the latch can be released permitting easy withdrawal of the assembly.
  • the FPC itself is preferably composed of a pair of insulating sheets between which the conductors are sandwiched other than in the area where the conductors, spaced apart to match the contacts, are exposed. One of these sheets is bonded to the V-shaped member to extend over both sections of the latter.
  • ribs on the inner surface of one of the walls of the housing locate the fixed regions of the contacts therebetween and a slot in a rear wall of the housing presents a row of pins connected to the individual contacts.
  • a connector constructed in accordance with the invention is composed of complementary mating components in the form of a housing 10 providing a socket for receiving an FPC assembly 30.
  • the housing is made from an insulating material and has an elongated opening 11 for access to female contacts 20 which are disposed within the housing 10 as shown in Figure 1A.
  • Each of the contacts 20 has a fixed region 21 extending at right angles to the opening 11 which locates with a first (bottom) wall 15 of the housing 10 and a contact region 22 connected via an inner base region to the fixed region 21.
  • the contact regions 22 of the contacts 20 lie alongside a second (top) wall 16 of the housing 10 opposite the first wall 15.
  • the FPC assembly 30 is inserted through the opening 11 to connect with the female contacts 20 as described in more detail hereinafter, the FPC assembly 30 being composed of a flexible printed circuit and a V-shaped spring member 40.
  • the flexible printed circuit (FPC) consists of a first insulating sheet 31, a second insulating sheet 32 and a parallel array of flat conductors 33 between the insulating sheets 31 and 32.
  • the spacing between each adjacent pair of conductors 33 is equal to the spacing between each adjacent pair of contacts 20.
  • the conductors 33 are exposed at a forward end portion 30a as shown in Figures 1A and 1C so that their exposed portion 33a can electrically connect with the contact regions 22 of the female contacts 20.
  • the spring member 40 is made from a sheet of resilient material e.g. synethic resin.
  • the resin sheet is bent along a first line 41 to provide first and second inclined sections 42 and 43 one above the other forming the limbs of the V-profile.
  • the sheets 31 and 32, and conductors 33 are likewise bent along the line 41 to present the exposed conductors 33a on the top section 43.
  • the top section 43 is bent down again along a line 46 spaced from the conductors 33a to provide a further section 47 which is itself bent up again along a margin at its rear edge.
  • the spring member 40 has lateral projections 44, 45 on the sections 42,43.
  • the projections 44 act as guides while the projections 45 act as latches.
  • the sections 42,43 are spaced apart more widely than the space between the fixed regions 21 and the contact regions 22 of the contacts 20.
  • FIGs 2 and 3A show the insertion of the FPC assembly into the female contact array in the housing 10.
  • the top section 47 of the spring member 40 is pushed by, for example, the operator's fingers towards the bottom section 43 in the direction of the arrow A.
  • the FPC assembly 30 is now inserted into the space between the fixed regions 21 and the contact regions 22 of the female contacts 20 in the direction of arrow B, with no frictional resistance produced there between.
  • Grooves 12 in inner faces of the side walls of the housing 10 receive the guide projections 44 and guide the assembly 30 in place.
  • the spring member 40 expands to urge the exposed conductors 33a against the inner surface of the contact regions 22 of the contacts 20.
  • the contacts 20 also firmly hold the spring member 40 and hence the FPC assembly 30 in place.
  • the electrical contact established between the conductors 33 and the contacts 20 is particularly reliable because of the dual resilience of the contacts 20 and the FPC assembly 30.
  • the contact region 22 of each female contact 20 has a contact area 22a upwardly inclined at angle nearly equal to that of the section 43 of the spring member 40, ensuring a positive, reliable and firm electrical connection between the contact regions 22 and the associated exposed conductors 33a.
  • the conductors 33 are covered with the insulating sheet 32 at all other areas except for the exposed conductors 33a which make contact with the areas 22a.
  • Stops 13 are formed at the front corners of the top wall 16 adjacent the side walls of the housing 10 and the projections 45 latch behind these stops 13 when the FPC assembly 30 is inserted as shown in Figure 3A.
  • the top wall 16 also has a lip 14 which engages on the section 47 of the spring member 40.
  • the FPC assembly 30 is reliably held, the FPC assembly 30 can be readily detached from the array of female contacts 20 when it is pulled from the opening 11 of housing 10, with the first and second sections 42 and 43 of the spring member 40 compressed together by the operator's fingers.
  • the position and size of the projections or stops 13 is preferably selected so that undue expansion of the female contacts 20 by the spring member 40 is restricted.
  • FIG. 6 shows the housing 10 without the contacts 20.
  • the housing 10 has ribs 17 arranged at the upper surface of the bottom wall 15.
  • the ribs 17 are spaced apart and serve as spacers by which the female contacts are isolated from each other with the ribs 17 therebetween.
  • the ribs 17 preferably also extend along a rear wall 18 perpendicular to the wall 15 in order to prevent the contact regions 22 from twisting.
  • This rear wall 18 has a slot 19 near the bottom wall 15.
  • Figures 7A and 7B show one of the female contacts 20 to be attached to the housing 10.
  • the contact 20 has the fixed region 21, the contact region 22 the base region connecting the regions 21,23 and a connecting pin 23 initially formed to project opposite to the region 21.
  • Notches 24 are formed on the pin 23 near the regions 22.
  • the pin 23 is bent perpendicular to the region 21, as indicated by the broken line ( Figure 7B) after it has been inserted into the housing 10 to project through a slot 19 in the housing 10 (see Figure 6).
  • the downward projecting ends of the pins 23 can be connected to a printed circuit board.
  • the notches 24 make frictional contact with the slot to prevent displacement or stoppage of the contact 20.
  • an additional protective sheet 50 can be bonded to the forward portion to overlie the section 42 and part of the section 43 and extend around the bend 41 as shown in Figure 4.
  • the sheet 50 may further facilitate the insertion of the FPC assembly 30 into the contacts 20.
  • Figure 5 shows a connector similar to the one shown in Figures 1, 2 and 3 except for the material of the spring member 40.
  • the spring member 40 is made from a metallic sheet e.g. stainless steel.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Organic Insulating Materials (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (13)

  1. Un connecteur pour circuits imprimés flexibles, ledit connecteur comportant :
       un boîtier isolant (10) présentant une ouverture oblongue (11) et une rangée de contacts femelles élastiques (20), agencés à l'intérieur du boitier et accessibles par l'ouverture (11), chaque contact (20) présentant une première zone (21) fixée à une première paroi (15) dudit boîtier sur un côté de l'ouverture oblongue et une seconde zone de contact (22) disposée le long d'une seconde paroi (16) du boîtier, faisant face à la première paroi ; et un système de circuit imprimé flexible, caractérisé en ce que ledit système de circuit imprimé flexible comprend un organe élastique en forme de V (40) fait d'un matériau en feuilles coudé autour d'un axe afin de former des premier et second éléments (42, 43) et un circuit imprimé flexible (31, 32, 33) fixé à la face externe de l'organe élastique (40) présentant une zone de conducteurs dénudés (33a) pour réaliser une connexion électrique avec des zones de contact des contacts, et en ce que le système de circuit imprimé flexible est inséré dans le boîtier à travers l'ouverture, l'organe élastique étant engagé entre les zones fixes et de contact des contacts femelles sous l'action de la force élastique.
  2. Un connecteur selon la revendication 1, dans lequel le circuit imprimé flexible comporte une feuille isolante (31) liée à la face externe de l'organe élastique (40) et une rangée parallèle de conducteurs plats (33) disposés sur la face externe de la feuille (31), les conducteurs étant espacés les uns des autres en correspondance à la distance entre les contacts (20).
  3. Un connecteur selon la revendication 2, dans lequel le circuit imprimé flexible comporte en outre une autre feuille isolante (32) qui recouvre le conducteur (33) sur une zone autre que celle où les conducteurs sont dénudés (33a), la feuille isolante supplémentaire (32) s'étendant au dessus de l'élément (42) de l'organe en forme de V (40) qui se trouve au voisinage des premières zones (21) des contacts (20).
  4. Un connecteur selon l'une quelconque des revendications 1 à 3, comportant en outre une pluralité d'entretoises (17) disposées sur la première paroi (15) du boîtier (10) afin de délimiter les premières zones (21) des contacts (20) et d'isoler les contacts les uns des autres.
  5. Un connecteur selon la revendication 4, dans lequel les entretoises ont la forme de nervures (17) s'étendant le long de la première paroi (15) du boîtier (10) dans la même direction que les premières zones (21) des contacts (20) et présentant des protubérances en relief s'étendant le long d'une autre paroi du boîtier, perpendiculaire à la première paroi (15).
  6. Un connecteur selon l'une quelconque des revendications 1 à 5, dans lequel l'élément (43) de l'organe en forme de V (40) qui est destiné à être au voisinage des zones de contact (27) des contacts (20) est coudé en outre autour d'un axe vers l'autre élément (42) qui est destiné à être au voisinage des premières régions (21) des contacts (20) afin de former un élément de prolongement (47) qui est coudé autour d'un autre axe au niveau d'une zone terminale en s'écartant de l'autre élément (42).
  7. Un connecteur selon l'une quelconque des revendications 1 à 6, comportant en outre des protubérances (13) formées sur les bords marginaux de la seconde paroi (14) du boîtier, adjacentes à l'ouverture (11), qui viennent en contact avec des butées (45) formées sur la zone (47) de l'organe en forme de V (40) qui est destinée à être adjacente aux zones de contact (22) des contacts (20) afin de retenir le système de circuit imprimé flexible (30) à l'intérieur du boîtier (10).
  8. Un connecteur selon l'une quelconque des revendications 1 à 6, dans lequel la zone (43) de l'organe en forme de V (40) qui est destinée à être adjacente aux zones de contact (22) des contacts (20) est pourvue de protubérances latérales (45) qui font fonction de verrou en venant en contact avec des butées (13) ménagées au voisinage de l'ouverture (11) du boîtier (10) afin de retenir le système de circuit imprimé flexible (30) dans le boîtier
  9. Un connecteur selon l'une quelconque des revendications 1 à 8, comportant en outre des moyens de guidage (44) ménagés sur les bords latéraux de l'organe élastique (40) qui sont destinés à être adjacents aux premières zones (21) des contacts (20), lesdits moyens de guidage étant susceptibles d'entrer en contact avec des moyens de glissière (12) prévus sur les parois latérales opposées du boîtier au niveau des côtés de l'ouverture (11) afin de guider le système de circuit imprimé flexible dans le boîtier.
  10. Un connecteur selon la revendication 9, dans lequel les moyens de guidage (44) sont constitués de protubérances latérales de la partie ou zone (42) de l'organe élastique (40), cependant que les moyens de glissière sont constitués de gorges (12) ménagées dans les faces internes des parois latérales opposées du boîtier.
  11. Un connecteur selon l'une quelconque des revendications 1 à 10, comportant en outre une feuille protectrice (50) montée sur la surface externe dudit circuit imprimé flexible afin de s'étendre au moins partiellement au-dessus des zones de l'organe en forme de V.
  12. Un connecteur selon l'une quelconque des revendications 1 à 11, dans lequel l'organe élastique (40) est formé d'une feuille de résine synthétique ou d'une feuille métallique.
  13. Un connecteur selon l'une quelconque des revendications 1 à 12, dans lequel le boîtier présente une ouverture supplémentaire (19) à travers laquelle s'étendent des fiches (23) reliées aux contacts (20).
EP86306772A 1985-09-06 1986-09-02 Connecteur pour un circuit imprimé flexible Expired - Lifetime EP0214830B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86306772T ATE66766T1 (de) 1985-09-06 1986-09-02 Verbinder fuer eine biegsame gedruckte schaltung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60197134A JPH0665090B2 (ja) 1985-09-06 1985-09-06 Ｆｐｃコネクタ
JP197134/85 1985-09-06

Publications (3)

Publication Number Publication Date
EP0214830A2 EP0214830A2 (fr) 1987-03-18
EP0214830A3 EP0214830A3 (en) 1988-09-07
EP0214830B1 true EP0214830B1 (fr) 1991-08-28

Family

ID=16369315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86306772A Expired - Lifetime EP0214830B1 (fr) 1985-09-06 1986-09-02 Connecteur pour un circuit imprimé flexible

Country Status (11)

Country Link
US (1) US4684183A (fr)
EP (1) EP0214830B1 (fr)
JP (1) JPH0665090B2 (fr)
KR (1) KR950000798B1 (fr)
AT (1) ATE66766T1 (fr)
AU (1) AU585778B2 (fr)
BR (1) BR8604200A (fr)
CA (1) CA1270915A (fr)
DE (1) DE3681100D1 (fr)
HK (1) HK19692A (fr)
SG (1) SG5892G (fr)

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Also Published As

Publication number Publication date
AU6231186A (en) 1987-03-12
HK19692A (en) 1992-03-20
BR8604200A (pt) 1987-04-28
EP0214830A2 (fr) 1987-03-18
CA1270915A (fr) 1990-06-26
JPS6261283A (ja) 1987-03-17
KR950000798B1 (ko) 1995-02-02
JPH0665090B2 (ja) 1994-08-22
EP0214830A3 (en) 1988-09-07
US4684183A (en) 1987-08-04
ATE66766T1 (de) 1991-09-15
SG5892G (en) 1992-03-20
DE3681100D1 (de) 1991-10-02
AU585778B2 (en) 1989-06-22
KR870003683A (ko) 1987-04-18

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